Added Infobip email adapter

src/Utopia/Messaging/Adapters/Email/Infobip.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Utopia\Messaging\Adapters\Email;
+
+use Utopia\Messaging\Messages\Email;
+use Utopia\Messaging\Adapters\Email as EmailAdapter;
+
+class Infobip extends EmailAdapter
+{
+    public function __construct(private string $apiKey) 
+    {
+    }
+
+    public function getName(): string
+    {
+        return 'Infobip';
+    }
+
+    public function getMaxMessagesPerRequest(): int
+    {
+        return 1000;
+    }
+
+    protected function process(Email $message): string
+    {
+        return $this->request(
+            method: 'POST',
+            url: 'https://3ggzv1.api.infobip.com',
+            headers: [
+                'Content-Type: multipart/form-data',
+                'Authorization: App ' . $this->apiKey,
+            ],
+            body: \json_encode([
+                'subject' => $message->getSubject(),
+                'to' => \array_map(
+                            fn ($to) => ['email' => $to],
+                            $message->getTo()
+                        ),
+                'from' => [
+                    'email' => $message->getFrom(),
+                ],
+                'attachment' => $message->getAttachments(),
+                'html' => $message->isHtml(),
+
+            ]),
+        );
+    }
+}